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免疫疗法 1

癌症 1

调节性T细胞 1

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Antitumor immunity of human SART3 gene vaccine against mouse tumor

HE Yu, YANG Shuhua, LIU Yong, LI Tao

《医学前沿（英文）》 2008年第2卷第1期页码 51-57 doi: 10.1007/s11684-008-0010-5

摘要： To determine whether squamous cell carcinoma antigen recognized by human T cell 3 (SART3) gene can induce antitumor immunity against tumor cells which express the gene, we constructed mouse tumor cells expressing human SART3 (LM8-SART3) and carried out experiments . After subcutaneous injection with SART3 gene vaccine, cytotoxic T lymphocyte (CTL) activity was measured using Cell Counting Kit-8. As for the part, C3H mice were divided into several groups. One group was challenged with tumor cells after immunity. Another group was treated with the vaccine after tumor implantation. It was found that human SART3 DNA vaccine can elicit a specific CTL reaction from the mouse splenocytes. After vaccination, tumor occurrence and tumor growth speed was reduced. The vaccine also shows activity in tumor treatment. We conclude that the human SART3 DNA vaccine can induce antitumor ability against tumor cells expressing human SART3 (LM8-SART3) which may provide new possibilities in antitumor therapy.

关键词： antitumor therapy occurrence implantation DNA vaccine SART3 DNA

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Antioxidant and antitumor effects and immunomodulatory activities of crude and purified polyphenol extract

Xiaohong Kou,Lihua Han,Xingyuan Li,Zhaohui Xue,Fengjuan Zhou

《化学科学与工程前沿（英文）》 2016年第10卷第1期页码 108-119 doi: 10.1007/s11705-016-1553-7

摘要： The antioxidant and antitumor effects as well as the immunomodulatory activities of crude and purified polyphenol extract from blueberries were investigated. The antioxidant and antitumor effects of the polyphenol extract were measured both and , and their effect on the immune systems of CD-1 tumor-bearing mice were also analyzed. assays demonstrated that blueberry purified polyphenol extract (BBPP) exhibited higher antioxidant activities than blueberry crude polyphenol extract (BBCP), but the opposite effect was observed . Both the and antitumor activity and the immunity assay showed that BBCP not only inhibited tumor growth, but also significantly improved the immunity of the mice. According to physical and histological studies, the CD-1 tumor-bearing mice treated with the polyphenol extract, especially high doses of BBCP experienced a higher quality of life than the positive control group (treated with cyclophosphamide). These results indicate that BBCP has significant antioxidant and antitumor activities and that it can enhance the immunity of CD-1 tumor-bearing mice.

关键词： crude polyphenol extract purified polyphenol extract blueberry antioxidant antitumor immunity

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, a novel non-ligand-blocking agonistic anti-OX40 antibody, exhibits superior immune activation and antitumor

《医学前沿（英文）》 doi: 10.1007/s11684-023-0996-8

摘要： OX40 is a costimulatory receptor that is expressed primarily on activated CD4⁺, CD8⁺, and regulatory T cells. The ligation of OX40 to its sole ligand OX40L potentiates T cell expansion, differentiation, and activation and also promotes dendritic cells to mature to enhance their cytokine production. Therefore, the use of agonistic anti-OX40 antibodies for cancer immunotherapy has gained great interest. However, most of the agonistic anti-OX40 antibodies in the clinic are OX40L-competitive and show limited efficacy. Here, we discovered that BGB-A445, a non-ligand-competitive agonistic anti-OX40 antibody currently under clinical investigation, induced optimal T cell activation without impairing dendritic cell function. In addition, BGB-A445 dose-dependently and significantly depleted regulatory T cells in vitro and in vivo via antibody-dependent cellular cytotoxicity. In the MC38 syngeneic model established in humanized OX40 knock-in mice, BGB-A445 demonstrated robust and dose-dependent antitumor efficacy, whereas the ligand-competitive anti-OX40 antibody showed antitumor efficacy characterized by a hook effect. Furthermore, BGB-A445 demonstrated a strong combination antitumor effect with an anti-PD-1 antibody. Taken together, our findings show that BGB-A445, which does not block OX40–OX40L interaction in contrast to clinical-stage anti-OX40 antibodies, shows superior immune-stimulating effects and antitumor efficacy and thus warrants further clinical investigation.

关键词： BGB-A445 OX40 agonistic antibody OX40L noncompetitive

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调节性T细胞及其在抗肿瘤免疫疗法中的临床应用 Review

解丰, 梁瑞, 李丹, 李斌

《工程（英文）》 2019年第5卷第1期页码 132-139 doi: 10.1016/j.eng.2018.12.002

摘要：

癌症是可能危及生命的疾病，特点在于肿瘤细胞在宿主身上无限增殖。最近，因其具有预防肿瘤进展和转移的巨大潜力，免疫疗法受到越来越多研究者的关注。调节性T 细胞（Treg）是对维持宿主免疫稳态起重要作用的抑制性CD4+ T 细胞的一个亚群。调节性T 细胞缺陷可引起严重的自身免疫、过敏和自身炎症等疾病。调节性T 细胞通常富集在肿瘤微环境中，而大量免疫抑制调节性T细胞往往表明预后较差。因此，人们对调节性T 细胞的功能及其在抗肿瘤免疫疗法中的临床应用再次产生了兴趣。越来越多的策略关注调节性T 细胞的消耗，这在抗肿瘤免疫方面似乎有效。预计调节性T 细胞靶向策略与其他疗法（如嵌合抗原受体T 细胞疗法或免疫检查点阻断）联用将为提高抗肿瘤疗效带来重大机遇。

关键词：调节性T细胞癌症免疫疗法